Valve seat



April 1 1924. 1,488,484

- F. B. FARMER VALVE SEAT Fild Dec. 27. 1920 INVENTOR FRED B. FARMER Patented Apr. 1, 1924.

'rEs

PATENT oFFic.

FRED B. FARDIEB, OF ST. PAUL, MINNESOTA, ASSIGNOR TO THE WESTINGHOUSE AIR BRAKE COIMPANY, OF WILBIERDING, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

VALVE SEAT.

Application filed December27, 1920. Serial No. 433,156.

ful Improvements in Valve Seats, of which the following is a specification.

This invention relates to rubber or com position seats, and more particularly to an annular seat disk adapted to be mounted inv position in a corresponding annular pocket, such as the rubber seat disk employed in connection with the well known emergency valve of a triple valve device for fluid pressure brakes.

In molding seat disks of the above character, fins are liable to be formed at the juncture of the lower face with the annular face, which tend to prevent the snug fitting of the seat disk into the pocket, and also, particles of dirt are liable to lodge in the corner of the pocket so as to prevent the proper fitting of the seat disk in the pocket and the consequence is that the seat disk is apt to buckle and thus prevent the making of a tight seal when there is engagement between the coacting valve members.

The principal object of my invention is to provide a valve seat disk in which the above difficulties are overcome.

In the accompanying drawing, the single figure is an elevational view of a portion of the emergency valve mechanism of a triple valve device, showing the improved seat disk applied.

As shown in the drawing, the construction may comprise coacting valve members, of which the member 1 is provided with an annular pocket containing a seat disk 2 adapted to fit snugly within the pocket, and the other valve member 3'having an annular portion adapted to engage or be engaged by the seat disk 2.

According to my invention, the seat disk 2 is chamfered at 4, where the face opposite the seat face of the seat disk meets the outer annular or peripheral face thereof, so that there will be a clearance space for any fin which might be left on the seat disk at the corner, in the molding of the disk, and this clearance space will also prevent particles of dirt and the like, which may have become lodged in the corner of the pocket, from interfering with the proper and snug fitting of the seat disk within the pocket.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

The combination of coacting valve members, of which one member comprises a body having a sharp cornered annular pocket and disk of resilient material mounted in said pocket and having a seating face for cooperating with the other valve member, an opposite face bearing on the bottom wall of the pocket, a peripheral face, and a chamfered face connecting the peripheral face with said opposite face.

In testimony whereof I have hereunto set my hand.

FRED 13. FAR MER. 

